diff options
author | Namhyung Kim <namhyung.kim@lge.com> | 2013-06-04 01:50:29 (GMT) |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2013-08-07 20:35:26 (GMT) |
commit | 3b47abe1b5f5446ab41a3a139b6075f46f77f21f (patch) | |
tree | 0b4308b875861f04b1675229fe2268697ed165ab /tools/perf/util/util.c | |
parent | 3223565cdf856fa07024e5db7ca24e1b1b38d1db (diff) | |
download | linux-fsl-qoriq-3b47abe1b5f5446ab41a3a139b6075f46f77f21f.tar.xz |
perf util: Add parse_nsec_time() function
The parse_nsec_time() function is for parsing a string of time into
64-bit nsec value. It's a preparation of time filtering in some of perf
commands.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: David Ahern <dsahern@gmail.com>
Acked-by: David Ahern <dsahern@gmail.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1370310629-9642-1-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/util.c')
-rw-r--r-- | tools/perf/util/util.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c index 9a06584..6d17b18 100644 --- a/tools/perf/util/util.c +++ b/tools/perf/util/util.c @@ -328,3 +328,36 @@ void put_tracing_file(char *file) { free(file); } + +int parse_nsec_time(const char *str, u64 *ptime) +{ + u64 time_sec, time_nsec; + char *end; + + time_sec = strtoul(str, &end, 10); + if (*end != '.' && *end != '\0') + return -1; + + if (*end == '.') { + int i; + char nsec_buf[10]; + + if (strlen(++end) > 9) + return -1; + + strncpy(nsec_buf, end, 9); + nsec_buf[9] = '\0'; + + /* make it nsec precision */ + for (i = strlen(nsec_buf); i < 9; i++) + nsec_buf[i] = '0'; + + time_nsec = strtoul(nsec_buf, &end, 10); + if (*end != '\0') + return -1; + } else + time_nsec = 0; + + *ptime = time_sec * NSEC_PER_SEC + time_nsec; + return 0; +} |